Floodplain The term 'Floodplain' as it applies to the area of coastlines can be defined as ' (1) a flat tract of land bordering a river, mainly in its lower reaches, and consisting of alluvium deposited by the river. it is formed by the sweeping of the meander belts downstream, thus widening the valley, the sides of which may become some kilometers apart. in time of flood, when the river overflows its banks, sediment is deposited along the valley banks and plains. (2) (smp) synonymous with 100-year floodplain. the land area susceptible to being inundated by stream derived waters with a 1 percent chance of being equaled or exceeded in any given year. the limits of this area are based on flood regulation ordinance maps or reasonable method that meets the objectives of the smp (wac 173-22-030(2))'.

The term 'Floodplain' as it applies to the area of flooding can be defined as 'Any land area susceptible to being inundated by floodwaters from any source'.

About the author

Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English".